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Chapter 5
Chapter 5, Electrons in Atoms: vocab and key ideas
| Question | Answer |
|---|---|
| What are energy levels? | the fixed energies an electron can have. |
| What is a quantum of energy? | the amount of energy required to move an electron from one energy level to another energy level. |
| The modern description of the electrons in atoms is known as what? | the quantum mechanical model |
| What mathematical solution did the quantum mechanical model come from? | the Scrodinger equation |
| The quantum mechanicalmodel determines what? | the allowed energies an electron can have and how likely it is to find the electron in various locations around the nucleus of an atom. |
| What does the atomic orbital describe? | the probability of finding an electron at various locations around the nucleus. |
| Orbitals describe where an electron is likely to be ______. | found |
| What was John Dalton's theory of what an atom was/looked like? | a tiny soild sphere |
| The ways in which electrons are arranged in various orbitals around the nuclei of atoms are called what? | electron configuration |
| According the the ____ principle, electrons occupy the orbitals of lowest energy first. | aufbau |
| What principle states that an atomic orbital may describe at most two electrons? | Pauli exclusion principle |
| Define spin: | a quantum mechanical property of electrons and may be thought of as clockwise or counterclockwise. |
| According to Hund's theory, electrons occupy what? | orbitals of the same energy in a way that makes the number of electrons with the same spin direction as large as possible/ |
| The amplitude of a wave is the wave's what? | the wave's height from zero to the crest |
| What is the distance between the crets known as? | the wavelenght (also represented by the Greek letter lambda) |
| The frequency, represented by the Geek letter nu, is the number of what? | wave numbers to pass a given point per unit of time. |
| The SI unit of cycles per second is called what? | hertz |
| ______ includes: radio waves, light waves, infared waves,visible light, ulraviolet rays, x-rays and gamma rays. | Electromagnetic radiation |
| When sunlight enters a prism, the different wavelenghts separate into a _______ of colors. | spectrum |
| What are photons? | light auantas |
| When is the atom at ground state? | when the electron has its lowest possible energy |
| What does the Heinsenberg uncertainty principal state? | it is impossible to know both the velocity and the position of a particle at the same time. |
Created by:
jmhschemistry
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